Remove the orphaned `main` dist-tag from npm

[arbrandes]

Description

Now that main publishes prereleases to the alpha dist-tag, the main dist-tag on npm is orphaned. It still points at 1.0.1-alpha.1 and will never be updated again, since future prereleases go to @alpha and stable releases go to @latest.

Remove it with a publish-authorized account:

npm dist-tag rm @openedx/frontend-base main